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Cloudflare 522 Error Checklist: Causes and Fixes - Windows 11 Assistant Stuck at 99 SFC Scan Fix-Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

2026-07-28 13:47:33
Cloudflare 522 Error Checklist: Causes and Fixes - Windows 11 Assistant Stuck at 99 SFC Scan Fix-Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

Next references

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